spring 无法在 vscode 中获取 jsp 文件

Question

我的IDE是VSCODE

tomcat server连接正常但是controller not working输入"http://localhost:8080/sp5-chap09/hello?name=abc"时出现404错误controller的println不起作用，所以console看不到log

当我访问“http://localhost:8080/sp5-chap09/src/main/webapp/WEB-INF/view/hello.jsp”时，在浏览器中显示jsp文件，没有出现404错误，但参数不能进口的

---

工作区树：

SP5-CHAP09
|   pom.xml
|
+---src
|   \---main
|       +---java
|       |   +---chap09
|       |   |       HelloController.java
|       |   |
|       |   \---config
|       |           ControllerConfig.java
|       |           MvcConfig.java
|       |
|       +---resources
|       \---webapp
|           \---WEB-INF
|               |   web.xml
|               |
|               \---view
|                       hello.jsp
|
\---target
    +---classes
    |   +---chap09
    |   |       HelloController.class
    |   |
    |   \---config
    |           ControllerConfig.class
    |           MvcConfig.class
    |
    +---generated-sources
    |   \---annotations
    +---maven-archiver
    |       pom.properties
    |
    +---maven-status
    |   \---maven-compiler-plugin
    |       \---compile
    |           \---default-compile
    |                   createdFiles.lst
    |                   inputFiles.lst
    |
    \---test-classes

---

controller：

package chap09;

import java.time.LocalDateTime;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;

@Controller
public class HelloController {
    @GetMapping("/hello")
    public String hello(Model model,
            @RequestParam(value="name", required=false) String name){
        model.addAttribute("greeting", "Hello, " + name);

        System.out.println("hello() method execute: " + LocalDateTime.now());

        return "hello";
    }
}

---

配置文件：

package config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import chap09.HelloController;

@Configuration
public class ControllerConfig {
    @Bean
    public HelloController helloController(){
        return new HelloController();
    }
}

package config;

import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.DefaultServletHandlerConfigurer;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.ViewResolverRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

@Configuration
@EnableWebMvc
public class MvcConfig implements WebMvcConfigurer{
    @Override
    public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer){
        configurer.enable();
    }

    @Override
    public void configureViewResolvers(ViewResolverRegistry registry){
        registry.jsp("/WEB-INF/view/", ".jsp");
    }
}

---

pom.xml：

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 
        http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>sp5</groupId>
    <artifactId>sp5-chap09</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>war</packaging>

    <dependencies>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>javax.servlet.jsp</groupId>
            <artifactId>javax.servlet.jsp-api</artifactId>
            <version>2.3.2-b02</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>5.2.2.RELEASE</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.7.0</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                    <encoding>utf-8</encoding>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

---

web.xml：

<?xml version="1.0" encoding="UTF-8"?>

<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee" 
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee 
             http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
    version="3.1">

    <servlet>
        <servlet-name>dispatcher</servlet-name>
        <servlet-class>
            org.springframework.web.servlet.DispatcherServlet
        </servlet-class>
        <init-param>
            <param-name>contextClass</param-name>
            <param-value>
                org.springframework.web.context.support.AnnotationConfigWebApplicationContext
            </param-value>
        </init-param>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>
                config.MvcConfig
                config.ControllerConfig
            </param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>

    <servlet-mapping>
        <servlet-name>dispatcher</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

    <filter>
        <filter-name>encodingFilter</filter-name>
        <filter-class>
            org.springframework.web.filter.CharacterEncodingFilter
        </filter-class>
        <init-param>
            <param-name>encoding</param-name>
            <param-value>UTF-8</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>encodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

</web-app>

---

查看文件：

<%@ page contentType="text/html; charset=utf-8" %>
<!DOCTYPE html>
<html>
    <head>
        <title>Hello</title>
    </head>
    <body>
        greeting: ${greeting}
    </body>
</html>

---

我搜索过，但没有适合我的解决方案我猜不到

Answer 1

我解决了。

1. 当你在 maven 上工作时，在 vscode 的左下方创建了 maven 项目任务行。
2. 如果单击任务行，工作区中的 maven 项目将显示为列表。
3. 其中，右击要操作的目录，在出现的列表中选择select‘package’。
4. 发生 maven-war-plugin 版本错误。
5. 在 pom.xml 中添加了 maven-war-plugin 3.2.2。
6. 如果您 select 再次“打包”，则会在目标文件夹中创建一个 war 文件。
7. 添加tomcat服务器中创建的war文件。
8. 如果确实在浏览器中显示，则 maven 项目正常运行。
9. 每次编辑代码时都必须单击“包”。